Question

Ma puteti ajuta la aceste 2 exerciti?

Answer 1

[tex]a= \sqrt{ \sqrt{5}- \sqrt{29-12 \sqrt{5} } } \\ a= \sqrt{ \sqrt{5} -( \sqrt{ \frac{29+11}{2} }- \sqrt{\frac{29-11}{2}} ) } Folosim formula radicalilor suprapusi[/tex]
[tex]a= \sqrt{ \sqrt{5} -(2 \sqrt{5} -3} ) \\ a= \sqrt{3- \sqrt{5} } \\ a= \sqrt{ \frac{5}{2}} -1[/tex]

Relatia are loc daca:
lx-1l=0 si lx²-1l=0 si lx³-1l=0
x-1=0 si x²-1=0 si x³-1=0
x=1 si x²=0 si x³=1
x=1 si x=1 sau -1 si x=1⇒x=1